/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.teiid.translator;

import java.util.List;

import org.teiid.language.Call;
import org.teiid.language.QueryExpression;

/**
 * Defines an execution for {@link QueryExpression}s and {@link Call}s that
 * returns a resultset, which is represented through the iterator method
 * {@link #next()}.
 */
public interface ResultSetExecution extends Execution {

    /**
     * Retrieves the next row of the resultset.
     * @return the next row or null indicating that there are no more results
     * @throws TranslatorException
     * @throws DataNotAvailableException
     */
    List<?> next() throws TranslatorException, DataNotAvailableException;

}
